Yeh I agree aegir, to call the pilot a cowboy is unfair. It's more likely the crew have forgotten where the wires were and did not sight the hardware on the hill before and during take off. It's a big span that doesn't seem to have marker balls, plus with the light in the wrong direction the wires have probably blended into the back ground. It's good old flying in the wire environment. CRM stuff. Look at some of the Ag, Power line, fire and EMS accidents, they usually hit the wires they knew were there but got preoccupied, were tired or distracted. All it takes is a few seconds loss of concentration due to a phone beeping, someone waving at you etc...